Add vendor pre-population for bulk code and individual edit forms

- Add vendor-changed HTMX handlers for both bulk code and individual edit
- Pre-populate default account at 100% when vendor is selected and no accounts exist
- Fix render-accounts-section to render from step-params correctly
- Change bulk code vendor-changed from hx-get to hx-post to include form data
- Add routes for vendor-changed endpoints
- Update e2e tests to cover vendor pre-population
- Run lein cljfmt fix across codebase

src/clj/auto_ap/graphql/intuit_bank_accounts.clj

@@ -7,6 +7,6 @@
 (defn get-intuit-bank-accounts [context _ _]
   (assert-admin (:id context))
   (->graphql (map first (dc/q '[:find (pull ?e [*])
-                               :in $
-                               :where [?e :intuit-bank-account/external-id]]
-                             (dc/db conn)))))
+                                :in $
+                                :where [?e :intuit-bank-account/external-id]]
+                              (dc/db conn)))))